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#668045 - 01/07/11 03:09 PM Shorai Battery
wsreid Offline
Newer Member

Registered: 02/16/07
Posts: 31
Loc: Albuquerque, New Mexico
Just saw an ad in Motorcyclist touting the lithium Shorai battery as an OEM replacement. Being on my third OEM battery in my 2006 R1200RT (all replaced under the battery warranty, fortunately), the Shorai ad copy is tempting (and not just because of the young lady in the red bikini). Anyone had any experience with this battery?

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#668054 - 01/07/11 03:26 PM Re: Shorai Battery [Re: wsreid]
JimD Offline
Member

Registered: 07/26/07
Posts: 115
Loc: Lubbock,Texas
Was there a web site link? I have not heard of anyone making a Lithum replacement battery.

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#668063 - 01/07/11 04:21 PM Re: Shorai Battery [Re: JimD]
Jerry Duke Offline
Member

Registered: 04/10/03
Posts: 945
Loc: Savannah, GA
Watch and learn grasshopper
Google > Shorai > http://www.shoraipower.com/t-shorai-models.aspx
Don't know anything about their batteries, but I agree, the girls make the visit worth the wear and tear on my fingers....

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#668064 - 01/07/11 04:32 PM Re: Shorai Battery [Re: Jerry Duke]
bmurphypdx Offline
Member

Registered: 11/29/06
Posts: 408
Loc: Portland, OR
Originally Posted By: Jerry Duke
Watch and learn grasshopper
Google > Shorai > http://www.shoraipower.com/t-shorai-models.aspx
Don't know anything about their batteries, but I agree, the girls make the visit worth the wear and tear on my fingers....


The website is not responding. Must be too many BMWSTers checking out the bikinis . . .ah, I mean batteries.


Edited by bmurphywa (01/07/11 04:32 PM)
_________________________
Better To Be Panglossian Than To Fret About The Sword of Damocles

Bill
Portland, OR
2007 R1200ST
2005 F650CS (sold to ins-co. after meeting a buck)

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#668115 - 01/07/11 07:12 PM Re: Shorai Battery [Re: bmurphypdx]
moshe_levy Offline
Member

Registered: 07/05/06
Posts: 3697
Loc: NJ - God Help Me
Was a reason found why your batteries are failing? Even a mediocre stock gel or agm should last 3-5 years on average.

-MKL
_________________________
http://www.mklsportster.com/
2013 Moto Guzzi V7 Racer
2009 BMW R1200RT
1973 BMW R75/5
BMW-MOA, AMA, IBA

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#668154 - 01/07/11 10:24 PM Re: Shorai Battery [Re: wsreid]
Jon_M Offline
Member

Registered: 05/19/05
Posts: 710
Loc: Altadena
I finally got the site to give me a listing for the R12RT. It's selling for $187. I am due for a replacement (5 years on the original in my '05), so I would like to see some reviews!
_________________________
Jon
'05 R12RT
'67 R69S

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#668188 - 01/08/11 07:39 AM Re: Shorai Battery [Re: Jon_M]
moshe_levy Offline
Member

Registered: 07/05/06
Posts: 3697
Loc: NJ - God Help Me
Here's a review... I have some experience with these types of batteries, as my company uses them in some of the UPS Systems we produce for the military. We just touched on this over at the "Hybrid Hatred" thread, but here again is some of the application note I wrote for my company's UPS Systems re traditional sealed lead acid batteries vs. LiFePO4 (full text here http://www.novaelectric.com/life.php for reference):

Some advantages of the LiFePO4 are listed below for reference:

4X higher energy density than lead-acid battery: The gravimetric energy density of the LiFePO4 battery is ~130 Wh/kg, almost four times higher than that of a typical Lead-acid battery, at 35Wh/kg. For the UPS user, this means far greater run times while running on battery, without any space penalty.

Light Weight: Despite the vastly higher energy density, the LiFePO4 battery packs are, in most cases, only 1/3 the weight of conventional lead acid packs. So for applications where weight savings are critical, the use of LiFePO4 batteries can result in significant reductions in overall system weight.

Long Life: LiFePO4 battery packs typically achieve a minimum of 2000 cycles with 70% capacity remaining, with up to 5000 cycle potential. This is equivalent to the 8-12 year expected life the very best sealed, lead acid batteries offer. Further, LiFePO4 batteries do not suffer from the “memory effect” of some conventional lead acid batteries.

Better Voltage Regulation: Unlike the Lead acid battery, the LiFePO4 battery terminal voltage remains relatively constant during high rate discharge. This equates to much better performance during high rate (short time period) discharges, yielding a much better AH performance during this type of application, typical in UPS systems.

Wide Temp Range: LiFePO4 battery packs are typically sold for operation between -20°C to +60°C, charging between -10°C to +60°C, and storage between -40°C to +70°C. This is equivalent to the ranges that only premium sealed, lead acid batteries offer.
Safety with power: Safety is equivalent to or better than the traditional lead acid type, without the risk of explosion or fire outbreak associated with some other new battery technologies. The LiFePO4 battery has hybrid characteristics: it is as safe as the lead-acid battery and as powerful as the lithium ion battery.

A Greener Battery: The eco-friendly LiFePO4 battery packs are recyclable and non-toxic.

Battery Management: All LiFePO4 Batteries are provided with a Battery Management System (BMS) which protects the battery cells within the Nova LiFePO4 Battery pack. The BMS will protect the cells to be sure they do not go outside of the normal limits of Cell voltage of the minimum discharge voltage of 2.8 V, the working voltage of 3.0 V – 3.3 V, and the maximum charge voltage of 3.6 V. The BMS also provides short circuit protection which prevents high current in the event of an external short circuit.

(end text)

Now, obviously, you see that the two main advantages here are tremendous power density and lighter weight. The rest is mainly "equivalent to" in order to assuage skeptical customers looking for a catch.

Batteries like this certainly have their place, in applications where large amounts of battery are required and space or weight becomes an issue - think aircraft, or think of the massive traction battery systems in some hybrid cars. The idea there of getting the same capacity in less space and 2/3 less weight is certainly nothing to sneeze at.

But here, we're talking about one battery, in a fixed tray, on a motorcycle which is not in a category where a few pounds this way or that are going to matter. If you save some space in the battery tray, what are you going to do with it? If the bike weighs a few pounds less, are you going to notice?

So bottom line is, the batteries as replacement cells for the bike or car is, for most people, an answer to a question nobody asked.

Further, for much less money, you can buy a truly good battery, such as Enersys (sold as "Odyssey" to consumers, model PC680 for the RT) which will give you 8-10 years on average without issue and more than enough performance in any given motorcycle application.

Bikini girls are great, and I love them as much as anybody else, but a website with NO useful specs (charge / discharge curves, temp range, lifecycle estimates, etc.) is a sad thing for any serious battery consumer.

-MKL
_________________________
http://www.mklsportster.com/
2013 Moto Guzzi V7 Racer
2009 BMW R1200RT
1973 BMW R75/5
BMW-MOA, AMA, IBA

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#668190 - 01/08/11 07:47 AM Re: Shorai Battery [Re: moshe_levy]
johnlt Offline
Member

Registered: 11/04/02
Posts: 4745
Loc: Green Valley, AZ
Good summary Moshe, thanks.
_________________________
johnlt
2009 BMW R1200 GS Adventure
2009 Yamaha WR250R
2004 DR200
1975 R75/6 (loaned to my son....yeah right!!

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#668202 - 01/08/11 09:06 AM Re: Shorai Battery [Re: moshe_levy]
Paul Mihalka Offline
Old Fart
Member

Registered: 07/20/00
Posts: 12058
Loc: Sykesville, MD
Moshe, a bit of a hijack question: In your post (excellent) you mention xxxx cycles as a measure of life. What constitutes a "cycle"? Is a motor start load a cycle? Usually when talking battery life we talk in years. Is cycles a better measure? If yes, the way I ride would explain the usually shorter than average battery life in my bikes.
_________________________
Age is a issue of mind over matter. If you don't mind, it doesn't matter... (Mark Twain)
Many years and 1 million (s)miles.

'05 R1200GS lotsa miles (sold)
'09 Yamaha Majesty - yes, a scooter

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#668211 - 01/08/11 10:01 AM Re: Shorai Battery [Re: Paul Mihalka]
GordonB Offline
Member

Registered: 03/25/05
Posts: 1283
Loc: Huntington Beach, CA
Battery cycles refer to the number of 'full' recharges.
Take a cell phone battery. Run it down all the way and recharge it, that's a 'cycle'
However run it down 50% and fully recharge that's considered 1/2 a cycle.
_________________________
2012 R1200RT
2007 R1200RT, sold
2000 R1100RT, off to boneyard
2005 Vespa GT, sold

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